Coplanar Side-Fed Tightly Coupled Ultra-Wideband Array for Polar Ice Sounding

We describe a planar ultra-wideband (UWB) dual-polarized tightly coupled bowtie antenna array for ground-based polar ice sounding radar. The array operates over 180 - 620 MHz with a bandwidth ratio of 3.4:1. The broadband performance is benefit from the tightly coupled antenna elements. By carefully...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2022-06, Vol.70 (6), p.1-1
Main Authors: Li, Linfeng, Yan, Jie-Bang, O'Neill, Charles, Simpson, Christopher D., Gogineni, Prasad
Format: Article
Language:English
Subjects:
Antenna arrays
antenna feeds
Antennas
Broadband
Broadband antennas
Cables
Dual polarization radar
Electric power distribution
Ice
Ice sheets
Impedance
Impedance matching
Microstrip
Phased arrays
planar arrays
Radar antennas
Radar arrays
Sounding
Ultra wideband antennas
Ultrawideband
Ultrawideband radar
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Description
Summary:We describe a planar ultra-wideband (UWB) dual-polarized tightly coupled bowtie antenna array for ground-based polar ice sounding radar. The array operates over 180 - 620 MHz with a bandwidth ratio of 3.4:1. The broadband performance is benefit from the tightly coupled antenna elements. By carefully integrating the impedance matching network into one arm of the bowtie antenna and using a ferrite core for common mode suppression, this coplanar side-fed array avoids the use of vertical balun and external antenna matching network. The size of the full array is 2.8 m × 2.8 m with a weight of only 90 kg, including 24 power distribution boards and 288 feed cables. The thickness of the array is 12.7 cm, which is only about 0.08λ at the lowest operating frequency. This antenna array was deployed to Greenland in summer 2019 as a part of a surface-based UWB ice-sounding radar to measure and characterize Greenland ice sheet.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2021.3138544